Rope paper-carrier for paper machines



Oct. 1927;

J. F. THIBEDEAU. ET AL ROPE PAPER CARRIER .FOR PAPER MACHINES Filed Oct. 21, 1926 v N W 5 7 vi m. MN gg W VQ\ ....H|. .(V.

Patented Oct. '18, 1927.

UNITED STATES 1mm OFFICE.

zrosnrn r. THIBEDEAU, ADELARD DEGUIRE, WILLIAM TURNER, AND ARCHIIBAULTD MGDERMID ,.OF ESPANOLA, ONTARIO, CANADA, ASSIGNORS TO THE SPANISH RIVER PULP 8: PAPER MILLS,- LIMITED, OF ESPANOLA, CANADA.

PAPER-CARRIER FOR PAPER MACHINES.

Application filed October 21, 1926. Serial No. 148,109.

=This invention relates to rope carriers suchv as employed to carry a lead strip of paper through the press rolls of a Fourdrinier paper-machines Such carriers inelude a pair of endless ropes which are adapted to grip the lead strip andwhich are led in proximity to a paper carrying feltand thence around sheaves atthe' ends of rollers around which the paper is required to pass sitated the shutting down of the machine 1 when "new ropes required to be fitted, re sulting in an expensive waste of'time.

Our object, therefore, is to devise a construction of rope carrier which will greatly increase the life of the ropes, which will render it unnecessary to shut down for renewals, and in which the ropes will be dry when called into action.

a We attain our object by providing the rollers round which both the ropes and paper pass with guide sheaves for the ropes which do not rotate with the rolls and by providing-drive mechanism for the ropes including a normally loose belt which may be tightened up by a suitable tightener whenever the ro'pecarrierisneeded to pick up a lead strip.

The invention is hereinafter more fully described and is illustrated in the accompanying drawings in which Fig. 1 is a side elevation of. part of a Fourdrinier paper making machine showing the invention applied to the last press rolls of themachine;

Fig. 2 a plan view of-part of the same, and

Fig. 3 a modified form-of rope guide on upperpress r0ll.

l and 2 are respectively the upper and lower press rolls next the driers. 3 is the receiver drier to which the paper passes from the press rolls. 4. is the conveyor felt which brings the web-ofpaper to the press rolls and which passes beneath the same.

- 5 and. 6 are paper guiding rolls arranged one above the other over the rearward end of the conveyor feltfl. 7 is a paper-guiding roll arranged above the upper press roll.

Around this roll 7 the paper passes to the receiver drier. 8 is the felt which carries the paper between the press rolls. All'the parts above referred to are old in the art and are arranged and driven in a known manner.

The paper-carrying, ropes 9 and 10 are arranged and guided as follows. 11 is a rope driving sheave around which the ropes pass, which sheave is connected with a pulley 12 adapted to be driven by a loose belt 13 from the driving pulley 14, which is secured to any suitable constantly rotating part of the machine. When the rope is to be driven, the belt is tightened by mechanismherein after described.

From the driving sheave 11 the ropes pass around the tightener sheave 1 5,which is guided in a suitable guide way 16 and is tensioned by means of the weight 17 secured to a cable 18 passing round the sheave 19 and secured to the bearings of the tightener sheave 15. From the tightener sheave the ropes pass around the guide sheave 20, thence they are carried separately around the sheaves 21 and 22, which are spaced apart so that the ropes which formerly lay side by side are now separated to form a nip. The ropes are brought together again by passing under the guiding roller 23 ad jacent to the upper surface of the conveyor felt L- The ropes then pass side by side around sheaves 2425 at the ends of the rollers 5 and 6. These sheaves are not fixed to the. rollers as in the prior art, but are free to rotate on the journals of these rollers.

From the upper sheave 25 the ropes pass around astationary guide at one end of the upper press roll 1. Owing to the difficulty of journalling a large sheave concentric with the press roll, this stationary guide is formed of a series of small rollers 26, journalled on a frame member 27 formed on or connected with the main frame of the machine. These rollers are journalled so that their peripheries lie within an imaginary extension of thecylindrical surface of the pressroll by a distance substantially equal to the diameter of a rope. The ropes then pass around a sheave 28 concentric with the paper guiding roll 7 and mounted to rotate freely on the journal of the latter. The ropes then pass around the guiding sheaves 29 and 30, the sheave 29 being positioned so that the ropes lead close to the upper surface of the receiver drier 8, while the sheave 30 is positioned to give the ropes a proper lead to the driving sheave 11.

The. tightening mechanism hereinbefore referred to comprises a tightener pulley 31 journalled at one end of the bell crank lever 32. This lever is fulcrumed on the frame of the machine and its other end has a weight 33 connected thereto which tends to force the tightener pulley towards the belt 13 to tighten it and thus cause the ropes to be driven.

The tightener is normally held out of action by means of the cable 34 which extends over guide pulleys 35 and at its other end is releasably connected with a stationary part as, for example, by the hook 36 engaged in the keeper 37. When the hook is drawn out of the keeper, the weight causes the tightener pulley to tighten the belt and thus set the ropes in motion very promptly but without shock. a

The mode of operation is substantially as in known types of rope carrier. A; lead strip formed on the end of the web of paper is placed in the nip of the ropes in front of the roller 23 and is caught between the ropes and carried around the various paper carrying rolls and the upper press roll in substantial alinement with their peripheries, finally being carried to the receiver drier where it may be picked up by another rope carrier, which forms no part of the present invention. After the lead strip has reached the receiver drier, the strip is gradually widened out to the full width of the web in a known manner.

From the construction described it follows that the ropes are driven only at such times as a break has occurred in the paper web, and asthese breaks are relatively infrequent and as running conditions after a break are restored within a brief period of time, the wear and tear on the ropes is very markedly reduced as compared with constructions in which the ropes are constantly running.

When the ropes require renewal this job can be readily performed while the mach ne is in operation as all parts around which the ropes have to be carried are normally stationary. There is thus noloss of time during renewals unless a break in the paper happens to occur during the process, which is only a remote contingency. It is a fur ther advantage that the ropes are not constantly runnin while wet, which not only increases their life, but keeps them in better condition to grip the lead strip between them.

i In Fig. 3 is shown a modification of the normally stationary guiding rollers 26. The

roller bearings 26 are journalled by means of ball bearings 26 on the main frame of the machine or on a partcarried thereby and carry a ring 26*. A groove is formed in the periphery of the ring for carrying the ropes.

IVhat :We claim is:

1. In a paper-making machine the combination with a pair of rolls between which a web of paper is to be led; of means for carrying a lead strip thereto comprising a pair of endless ropes; normally stationary guiding means for the ropes at one end of oneof the rolls for guiding the ropes side by side around the roll below the web-carrying surface thereof; guiding'sheaves around which the ropes are carried to and from the aforesaid roll; sheaves in front of the latter being adapted to separate the ropes so that the end of the lead strip may be placed between them; and means whereby the said ropes may be driven at will from a constantly ro tating part of the machine.

2. In a paper-making machine the com bination with a pair of rolls between which a web of paper is to be led; of means for.

carrying a lead strip thereto comprising a pair of endless ropes; normally stationary guiding means for the ropes at one end of one of the rolls for guiding the ropes side by side around the roll below the web-carrying surface thereof; guiding sheaves around which the ropes are carried to and from the aforesaid roll, sheaves in front of the latter being adapted to separate the ropes so that the end of the lead strip may be placed between them; and means whereby the said ropes may be driven at will from a constantly rotating part of the machine, comprising a driving pulley, a driven pulley, a loose belt. and means for tightening the belt.

3. In a paper-making machine the combination with a pair of rolls between which v a web of paper is to beled, of means for carrying a lead. strip thereto comprising a pair of endless ropes; normally stationary guiding means for the ropes at one end of one of the rolls for guiding the ropes side by side around the roll below the web-carrying surface thereof comprising a series of small rollers journalled on a stationary part and arranged around an arc of the end of the roller; guiding sheaves aroundwhich the ropes are carried to and from the aforesaid roll, sheaves in front of the latter being adapted to separate the ropes so that the end of the lead strip may be placed between them; and means whereby the said ropes may be driven at will from a constantly rotating part of the machine.

4. In a paper-making machine the combination with a pair of rolls between which a web of paper is to beled, of means for carrying a lead strip thereto comprising a pair of endless ropes; normally stationary means whereby the said ropes may be driven at will from a constantly rotating part of the machine 5. In a paper-making machine the combination with a pair of rolls between which a web of paper is to be led; of means for carryinga lead strip thereto comprising a pair of endless ropes; normally stationary guiding means for the ropes at one end of one of the rolls for guiding the ropes side by side around the roll below the web-carrying surface thereof; guiding v sheaves around which the ropes are carried to and from the aforesaid roll, sheaves in front of the latter being adapted to separate the ropes so that the end of the lead strip may be placed between them; two paper guiding rolls, concentric with but not connected to rope carrying sheaves and arranged between the point of separation of the ropes and the pair of rolls aforesaid; a paper guiding roll, concentric with but not connected to a rope guiding sheave and arranged to receivethe paper after it leaves the pair of rolls aforesaid; and means whereby the said ropes may be driven at will from a constantly rotating part of the machine.

6. In a paper-making machine the combination with a pair of rolls between which a web of paper is to be led; of means for carrying a lead strip thereto comprising a pair of endless ropes; normally stationary guiding means for the ropes at one end of one of the rolls for guiding the ropes side by side around the roll below the web-carrying surface thereof; guiding sheaves around which the ropes are carried to and from the aforesaid roll, sheaves in front of the latter being adapted to separate the ropes so that the end of the lead strip may be placed between them; a carrying felt arranged to convey the paper to and below the pointof separation of the ropes; means whereby the said ropes may be driven at will from a constantly rotatinglpart of the machine; two paper guiding rolls, concentric with but not connected to rope carrying sheaves and arranged between the point of separation of the ropes and the pair of 'rolls aforesaid; and a paper guiding roll,

concentric with but not connected to a rope guiding sheave and arranged to receive the paper after it leaves the pair of rolls aforesaid the end of the lead strip may be placed between .them; means whereby the said ropes -may be driven at will from a constantly rotating part of the machine including a loose belt and a tiglitener; a weight'tending to operate the tightener; and releasable means normally holding the weight out of action.

8. In a paper-making machine the combination with a pair of press rolls between which a web of paper is to be led; a receiver .dryer to which it is to be led; a carrying felt below the press rolls; two paper guiding rolls, one above the other, around which the paper passes from the carrying felt to the press rolls, and a paper guiding roll between the upper press roll and the receiver dryer,- of means for carrying a lead strip to the press rolls and thence to the receiver dryer comprising a pair of endless ropes"; guiding means for the ropes concentric with the upper press roll and the paper guiding rolls aforesaid, said means being free of the rolls; sheaves adapted to separate the ropes above the conveyor felt so that the end of the lead strip may be placed between them; sheaves above the receiver drier around which the ropes are led; sheaves above the rope separating sheaves around which the ropes are led; a movable tightener sheave engaging a bight of each rope between the two last mentioned sheaves; and means for driving the ropes at will from a constantly rotating part of the machine.

9. In a paper-making machine the combination with a pair of press rolls between which a web of paper is to be led; a receiver.

dryer to which it is to be led;*- acarrying I felt below the press rolls; two paper guiding rolls, one above the other, around which the paper passes from the carrying felt to the press rolls, and a paper guiding roll between the upper press roll and the receiver dryer, of means for carrying a lead strip to the press rolls and thence to the receiver dryer comprising a pair of endless ropes;

- uidin means for the ro es concentric with the upper press roll and the paper guiding rolls aforesaid, said means being free of the rolls; sheaves adapted to separate the ropes above the conveyor felt so that the end of lit) the lead strip may be placed between them;

sheaves above the receiver drier around which the ropes are led; sheaves above the rope separating sheavex zuw' und which the ropes are led; a movubhtightener sheave engaging a bight of each rope between the two last mentioned sheaves: and means for driving the ropes at will from a constantly rotating part of the machine comprising a driven pulley connected with one of the rope guiding sheaves, a driving: pulley a looee belt and means foi' tightening the hoit.

Sign-ed niiispnnola this 25L day of September 1926.

JOQEPH I 'ITHIIEIaEiiLKU. AD ELARD DEGI 1 R11 WILLIAM TURN E13, ARCHIBAULD MCDMZMID. 

